Question

When using AIMPAC, the flux of this quantity’s gradient is taken to be zero when defining a surface. Perdew et al. proposed a framework for ordering methods of determining this quantity based on chemical accuracy nicknamed “Jacob’s ladder.” In a technique that calculates this quantity, exchange-correlation energy can be estimated by approximations like the GGA and LDA. Because a system’s ground state energy is uniquely dependent (10[1])on this quantity, determining the distribution of this quantity for a chemical is equivalent to “solving” its structure according to the Hohenberg–Kohn theorem. (-5[1])“Functionals” of this quantity (10[1])are used to model chemicals in DFT. For 10 points, name this quantity that describes a molecule’s negative charge per unit volume. ■END■ (10[5]0[2])

ANSWER: electron density [or charge density; or probability density; accept density functional theory; prompt on charge until read; prompt on probability]
<Chemistry>
= Average correct buzz position

Back to tossups

Buzzes

PlayerTeamOpponentBuzz PositionValue
Rasheeq Azad (UG)UNC B (UG)Virginia A (UG)6510
Munir Siddiqui (UG)Maryland B (UG)Maryland C (DII)88-5
Caleb Kendrick (Grad)Maryland A (Grad)UNC C (UG)9210
Ivan Stanisavljevic (DII)Duke A (UG)UNC D (DII)11510
Zander Werner (DII)Virginia C (UG)GWU B (Grad)11510
Jim Fan (Grad)UNC A (Grad)Liberty A (Grad)11510
Derek Works (DII)Liberty B (DII)GWU A (UG)11510
Logan Mitchell (UG)JMU B (UG)Liberty C (DII)1150
Nathan Redford (DII)Liberty C (DII)JMU B (UG)1150
Brian Lai (DII)Virginia B (UG)William & Mary A (UG)11510

Summary